Administration Console Online Help

Work with charts in the
Monitoring Dashboard

A view in the Monitoring
Dashboard displays one or more charts that contain runtime MBean
attributes with numeric or Boolean values that are useful to measure,
either as their current values or as their changes over time. These
values, referred to in the Monitoring Dashboard as metrics,
originate from either of the following sources:

Active runtime MBean instances, which are polled at each sampling
interval. These are called polled metrics.

The Archive, which holds collected metrics. Collected
metrics are those gathered by the Harvester, which must have been
previously configured as described in Configuring the
Harvester for Metric Collection. Collected metrics are useful
for examining historical metrics gathered during a specific time range
that has already passed.

Note that an individual metric is scoped to only a single server.

Charts can show either the current time range values of active
runtime MBean instances, or values from an earlier time range. Current
time range charts work with all metric types (that is, you don't have to
have first gathered collected metrics in the Archive), but charts that
display collected metrics need to be configured with a custom time
range. To configure a custom time range for a chart, see Set individual chart
properties. For more
information, see About Metrics and Chart Types.

When working with charts, the main tasks you perform include the
following:

Charts, and the changes you make to them, are automatically persisted
and in effect only for your user account and only in the current domain.
They are available to you the next time you launch the Monitoring
Dashboard. Note, however, that polled metric values that are displayed
in built-in and custom views are not persisted after you close the
Monitoring Dashboard window. For more information, see Using the Monitoring
Dashboard